The spelling of the word "keehn" can be explained using the International Phonetic Alphabet (IPA) phonetic transcription. The first sound is the "k" sound, which is pronounced with the back of the tongue touching the soft palate. The second sound is the "ee" sound, which is pronounced with the tongue high in the front of the mouth. The third sound is the "n" sound, which is pronounced with the tongue touching the alveolar ridge behind the front teeth. Together, these sounds create the word "keehn."